Which of the following expressions about the electrolysis of a salt solution is correct?

Expressions A about the electrolysis of a salt solution is correct. The correct expression is, $m=\frac{QM}{F\left|V_{\mathrm{e}}\right|}$.

The charge carried by each electron is $1.6\times {10}^{-19}$ coulombs. According to Faraday's Law, m = Z Q or m = Z /t. One equivalent (or mole) of electrons flowing per second will amount to 96485 Equivalents mass when one coulomb is equal to one electrochemical equivalent mass (Z) of the material.

Hence, correct option is A.